Rapid diagnosis of femtosecond laser filament by single laser shot-induced acoustic pulses[Invited]  

作　　者：Binpeng Shang Nan Zhang Zhi Zhang Pengfei Qi Lanjun Guo Lie Lin Weiwei Liu 尚滨鹏;张楠;张智;齐鹏飞;郭兰军;林列;刘伟伟(Institute of Modern Optics,Eye Institute,Nankai University,Tianjin 300350,China;Tianjin Key Laboratory of Micro-scale Optical Information Science and Technology,Tianjin 300350,China;Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology,Tianjin 300350,China)

机构地区：[1]Institute of Modern Optics,Eye Institute,Nankai University,Tianjin 300350,China [2]Tianjin Key Laboratory of Micro-scale Optical Information Science and Technology,Tianjin 300350,China [3]Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology,Tianjin 300350,China

出　　处：《Chinese Optics Letters》2024年第9期48-53,共6页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.12074198,12061131010,and 12304381);the Russian Science Foundation(RSF)(No.21-49-00023).

摘　　要：Due to the promising applications of femtosecond laser filamentation in remote sensing,great demands exist for diagnosing the spatiotemporal dynamics of filamentation.However,until now,the rapid and accurate diagnosis of a femtosecond laser filament remains a severe challenge.Here,a novel filament diagnosing method is proposed,which can measure the longitudinal spatial distribution of the filament by a single laser shot-induced acoustic pulse.The dependences of the point-like plasma acoustic emission on the detection distance and angle are obtained experimentally.The results indicate that the temporal profile of the acoustic wave is independent of the detection distance and detection angle.Using the measured relation among the acoustic emission and the detection distance and angle,a single measurement of the acoustic emission generated by a single laser pulse can diagnose the spatial distribution of the laser filament through the Wiener filter deconvolution(WFD)algorithm.The results obtained by this method are in good agreement with those of traditional point-by-point acoustic diagnosis methods.These findings provide a new solution and idea for the rapid diagnosis of filament,thereby laying a firm foundation for femtosecond laser filament-based promising applications.

关 键 词：femtosecond laser filamentation diagnosis single laser shot acoustic emission Wiener filter deconvolution 

分 类 号：TN24[电子电信—物理电子学]